420344101221 has 16 divisors (see below), whose sum is σ = 615160588800. Its totient is φ = 253191089520.

The previous prime is 420344101189. The next prime is 420344101237. The reversal of 420344101221 is 122101443024.

It is not a de Polignac number, because 420344101221 - 2⁵ = 420344101189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420344101191 and 420344101200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420344101621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39067321 + ... + 39078078.

It is an arithmetic number, because the mean of its divisors is an integer number (38447536800).

Almost surely, 2^420344101221 is an apocalyptic number.

It is an amenable number.

420344101221 is a deficient number, since it is larger than the sum of its proper divisors (194816487579).

420344101221 is a wasteful number, since it uses less digits than its factorization.

420344101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78145576.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 420344101221 its reverse (122101443024), we get a palindrome (542445544245).

The spelling of 420344101221 in words is "four hundred twenty billion, three hundred forty-four million, one hundred one thousand, two hundred twenty-one".